Is there a difference between early and later Bolt spare tire wells? My 2020 well is a truncated circle, 17" from front-to-back, so cannot accommodate a full-size spare.
I bought a 16" donut spare on Ebay that could (possibly) fit in the well if deflated, but since this a local commuter car I'll just leave it inflated on top of the 'hidden' compartment. The attached photos show the arrangement, starting with 1) a layer of 1/2" cardboard notched around the exposed bolts (I still had to grind them off and prime the cut bolt ends); 2) I glued on a second layer of 1/2" cardboard with cut-outs for the towing ring, lug nut wrench, and the base for an aluminum jack stand (chosen because it can be disassembled); 3) cardboard painted with tools in place; 4) Add the S10 jack in bubble-wrap to prevent rattling (found on the street - free!) and the Avid 12v inflater (its case has room for the jack stand's post and miscellaneous sidewall repair goop kits); 5) & 6) add the 120v charging cord and a tarp/poncho for dirty work; 7) the OEM styrofoam cover; 8) the 22.9" diameter donut spare. I need to add some gloves.....
The cut outs are the same for 2017-2023 Bolt EVs. EUV might be slightly different. But all of them won't accept a full spare.
Also note that Premier/2LT trims, have the subwoofer there in the bottom well. The stock styrofoam organizer has nice dedicated cutouts. For the portable charging cable, inflation pump, etc.
Here's how I organize mine - small hand tools at the top(this is where the factory inflator goes), portable inflator center & plug kit at the right(charging cable goes here), expanding/collapsing lug nut wrench + no mar socket at the bottom(folding reflective triangle goes here), gloves at 11 o'clock(factory goo sealant goes here). Few things; that's my reversible red screwdriver. There is a factory screwdriver provided for European and S. Korean models. I've started putting fresh/clean gloves in ziplock/sandwich baggies. In case I have to use them in a medical/first aid situation. Also, I prefer inflator kits that plug in - batteries will be another thing I have to worry about. Will they have juice/enough juice when I need them.
Full sized spare(215/50/17), goes in the middle section. doesn't matter if you have it facing up or down - you can put items inside to maximize space/room. I have an old towel that can be used for a few things. You can lay it out on the ground, in case you have to reach for something underneath. You can fold it up a bit, and use to make kneeling more comfortable. You can use it to wipe off your hands and tools. In this pic - I have it wrapped around the S10 jack - so nothing rattles: